package com.fabriciojf.controller;

import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

/**
 * FrontController
 *
 * @author Fabricio S Costa fabriciojf@gmail.com
 * @since 01/12/2009
 * @version 1.0
 */
public class FrontController extends HttpServlet {
    
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException, ClassNotFoundException {
        String action = request.getParameter("action");
        Action actionObject = null;
        if (action == null || action.equals(""))
            response.sendRedirect("index.jsp");
        
        actionObject = ActionFactory.create(action);
        
        if (actionObject != null)
            actionObject.execute(request,response);
    }
    
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
           processRequest(request, response);
        } catch(IOException ex) {
            ex.printStackTrace();
        } catch(ServletException ex) {
            ex.printStackTrace();
        } catch(ClassNotFoundException ex) {
            ex.printStackTrace();
        }   
    }
    
    /** Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try {
           processRequest(request, response);
        } catch(IOException ex) {
            ex.printStackTrace();
        } catch(ServletException ex) {
            ex.printStackTrace();
        } catch(ClassNotFoundException ex) {
            ex.printStackTrace();
        } 
    }
    
    /** Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>
}
